Ask Honest John

Most recently answered misfuelling questions
My 2009 diesel Ford Mondeo is fitted with a misfuelling inhibitor. I called in at a recently-refurbished Esso station in Stoke-on-Trent at the weekend to find both the petrol and diesel nozzles were the...
Have I been mis-sold a car? I feel I have. I was assured that I could not put petrol into a diesel engine by a Citroen salesmen. He categorically assured me that this was no longer possible. Needless to...
Yesterday I made the stupid mistake of putting petrol in my 2007 diesel car. I realised immediately and did not start the engine. We had a garage tow it and drain it. When we went to pick it up they said...
Recently (and I have the receipt to prove it) I filled my Vectra CDTi with V-Power Diesel (from just on the red to a full tank). The car subsequently started running very roughly, so I booked it in to...
I've been reading about inadvertent fuel contamination (putting petrol in your diesel tank or vice versa). The AA’s website link to "Fuel Assist" (their own mobile department for helping stranded motorists)...
Over the last few years I have noticed your comments on the intractability of Mercedes dealerships and poor customer service levels. I committed an error by putting petrol into my new diesel Mercedes....
Does wrong fuelling, in this case putting petrol in a diesel, result in permanent damage to the engine if it is driven until it breaks down? The car is a Toyota Previa 2005 diesel.
I thought I would try Shell V-Power diesel. At a Shell Garage I saw a logo in red with a V-Power sign on it and filled up from the pump showing the red V sign. This was the only one on the forecourt....
I borrowed my wife's 1-year-old BMW 318d this morning and when the fuel warning light came on (70 miles left, approx 2 gallons) I pulled into the petrol stations and filled it up. I pulled out of the station...
I recently did what appears to be what an ever increasing number of diesel fuelled cars owners are doing in that I filled my diesel Focus with petrol. The total cost of repairs, I was very luckily covered...